| Also known as | H1660 |
| Diagram | Fig. 14 — TELESCOPIC FRONT FORK, 3TA AND 5TA · ref 17 |
| Subsystem | forks front |
| Listed in parts books | 1964 |
Solo main spring (Unpainted)
Unpainted solo main spring for the telescopic front fork, listed under 97-1660 (formerly H1660).
This is the solo main spring for the telescopic front forks, catalogued unpainted, and it shows up in the fork-book listings alongside the nacelle headlamp and switch assembly page for the 6T. The main spring is the big coil inside each fork leg that the fork action rides on and that holds the front end up under load. It's a mechanical part, not a seal or bushing, so it doesn't wear out the way rubber parts do, but a tired or mismatched spring will let the front end sag or ride soft.
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The older parts-book reference for this one is H1660, so if you're working from an earlier catalog or a bike with the original paperwork, that's the number you'll see. Our records only show this part turning up in a couple of catalog listings, both tied to 1964, so treat that as the extent of what we can confirm rather than a broader fitment claim.
If you're rebuilding a fork leg and need to know whether this spring matches what's already in your bike, bring in the old one or give us a call before ordering - solo spring setups aren't universal across every fork variant Triumph ran.
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